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SSS 2012-01-17

时间:2012-02-17 05:34来源:互联网 提供网友:gmeng   字体: [ ]
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 People have used tobacco for well over a thousand years. And researchers recently found unique physical evidence of the ancient habit. They detected traces of tobacco in a 1300-year-old Mayan container. The work is in the journal Rapid Communications in Mass Spectrometry.

Based on hieroglyphics1 and images of people smoking, archaeologists assumed that the Mayans used tobacco. In the hope of finding physical remains2, the researchers examined the inside of a particular clay flask3 dating back to the year 700 AD. Analysis of the flask revealed the presence of nicotine4, as well as a few products of nicotine oxidation.
The chemical analysis owes some of its success to a dirty container—because the inside of the flask was not cleaned, the nicotine residue5 remained uncontaminated. It also helped that the flask had a single purpose, and was not reused to hold multiple products. But the most important aid to this discovery was undoubtedly6 some Mayan writing on the container. Which roughly translated means: container for tobacco.

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1 hieroglyphics 875efb138c1099851d6647d532c0036f     
n.pl.象形文字
参考例句:
  • Hieroglyphics are carved into the walls of the temple. 寺庙的墙壁上刻着象形文字。
  • His writing is so bad it just looks like hieroglyphics to me. 他写的糟透了,对我来说就像天书一样。
2 remains 1kMzTy     
n.剩余物,残留物;遗体,遗迹
参考例句:
  • He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
  • The remains of the meal were fed to the dog.残羹剩饭喂狗了。
3 flask Egxz8     
n.瓶,火药筒,砂箱
参考例句:
  • There is some deposit in the bottom of the flask.这只烧杯的底部有些沉淀物。
  • He took out a metal flask from a canvas bag.他从帆布包里拿出一个金属瓶子。
4 nicotine QGoxJ     
n.(化)尼古丁,烟碱
参考例句:
  • Many smokers who are chemically addicted to nicotine cannot cut down easily.许多有尼古丁瘾的抽烟人不容易把烟戒掉。
  • Many smokers who are chemically addicted to nicotine cannot cut down easily.许多有尼古丁瘾的抽烟人不容易把烟戒掉。
5 residue 6B0z1     
n.残余,剩余,残渣
参考例句:
  • Mary scraped the residue of food from the plates before putting them under water.玛丽在把盘子放入水之前先刮去上面的食物残渣。
  • Pesticide persistence beyond the critical period for control leads to residue problems.农药一旦超过控制的临界期,就会导致残留问题。
6 undoubtedly Mfjz6l     
adv.确实地,无疑地
参考例句:
  • It is undoubtedly she who has said that.这话明明是她说的。
  • He is undoubtedly the pride of China.毫无疑问他是中国的骄傲。
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